I have had a long running issue with the Hub 3 disconnecting overnight that I have raised multiple times with Virgin, one of their engineers came last year went through everything and said it all tested fine but he was a bit concerned that some of the other unused connections in this block of flats could be causing issues and needed terminating at the distribution panel on the roof.
Last night was exceptionally bad for disconnects, so I went into the Hub 3 network logs and discovered a whole list of No Ranging Response received, RCS Partial Service & SYNC Timing Synchronization failure all coming from the same MAC address of **:**:**:**:**:** which is not equipment on my network and the Mac to Vendor List says that's a Cisco Systems device which I don't have (I run Netgear and TP-Link equipment)
Just spent ages on the phone with Virgin insisting that its a problem with my equipment and its down to the Hub 3.0 being in modem mode and them insisting that because I can connect to the internet on with the hub in router mode with my pc directly plugged in its not their problem, which isn't actually the issue the connection going offline during the night is.
Anyone have any suggestions as to how I can convince Virgin that the equipment that's showing the fault isn't mine as they refused point blank to even check to see if a device with the mac of **:**:**:**:**:** and even denied that they use Cisco systems equipment on their network.
Update did some more digging on the MAC address, it resolves to a Cadent Inc, Cable modem network termination device (Now Arris International.)